msd_fib

0 1
0 -> 0
1 -> 1

1 0
0 -> 2

2 0
0 -> 3
1 -> 1

3 0
0 -> 4
1 -> 5

4 0
0 -> 6
1 -> 1

5 1
0 -> 4

6 0
0 -> 7
1 -> 1

7 1
0 -> 6
1 -> 1
